[Java知识库]Java对象转xml

代码格式

实体类

package com.jwttest.demo.toxml;

import javax.xml.bind.annotation.*;
import java.util.ArrayList;

@XmlRootElement(name="person")  // 父节点名称
@XmlAccessorType(XmlAccessType.FIELD) //定义这个类中的何种类型需要映射到XML
public class Person {
    @XmlElement(name = "name") // 子节点名称
    public String name;

    @XmlElementWrapper(name = "students") // 数组或集合节点名称
    @XmlElement(name = "student")
    public ArrayList<Student> arrayList;

    public ArrayList<Student> getArrayList() {
        return arrayList;
    }

    public void setArrayList(ArrayList<Student> arrayList) {
        this.arrayList = arrayList;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

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package com.jwttest.demo.toxml;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlTransient;

@XmlRootElement(name="student")
@XmlAccessorType(XmlAccessType.FIELD)
public class Student {
    public Integer length;
    public Integer high;

    public Student(Integer length, Integer high) {
        this.length = length;
        this.high = high;
    }

    @Override
    public String toString() {
        return "Student{" +
                "length=" + length +
                ", high=" + high +
                '}';
    }

    public Integer getLength() {
        return length;
    }

    public void setLength(Integer length) {
        this.length = length;
    }

    public Student() {
    }

    public Integer getHigh() {
        return high;
    }

    public void setHigh(Integer high) {
        this.high = high;
    }
}

转化代码

package com.jwttest.demo.toxml;

import org.springframework.util.StringUtils;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import java.io.PrintStream;
import java.io.StringWriter;
import java.util.ArrayList;

public class ToXml {
    public static void main(String[] args) throws JAXBException {
        Person person = new Person();
        Student student = new Student(1,2);
        Student student1 = new Student(3,4);
        ArrayList<Student> students = new ArrayList<>();

        person.setName("123");

        students.add(student);
        students.add(student1);
        person.setArrayList(students);
        String s = convertToXML(person);
        System.out.println(s);


    }

    /**
     * 将对象转为流程XML
     *
     * @param graphModel
     * @return
     * @throws JAXBException
     */
    /**
     * 将对象转为流程XML
     *
     * @param person
     * @return
     * @throws JAXBException
     */
    public static String convertToXML(Person person) throws JAXBException {
        JAXBContext jaxbContext = JAXBContext.newInstance(Person.class);
        StringWriter writer = new StringWriter();
        Marshaller marshaller = jaxbContext.createMarshaller();
        marshaller.marshal(person, writer);
        String xmlStr = writer.toString();
        xmlStr = StringUtils.replace(xmlStr, "&quot;", "'");
        return xmlStr;
    }
}

转化后
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<person>
  <name>123</name>
  <students>
    <student>
      <length>1</length>
      <high>2</high>
    </student>
    <student>
      <length>3</length>
      <high>4</high>
    </student>
  </students>
</person>